Biccherna
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The Biccherna was the magistrate or chancellery of finance from the 12th century to 1786 for the Republic (later city) of Siena in Tuscany, Italy.

The records of the office are significant not only because Siena was one of the earliest and most important banking centers of medieval Europe, but also because the books that contain these records were bound with painted leather covers, often made by major artists.[1] These covers tend to display secular subject matter that glorifies the city's government and its citizens.
Many of these covers are displayed in the State Archives of Siena located in the Palazzo Piccolomini located on via Banchi di Sotto corner via Rinaldini.
The name was derived from a contraction of the Palace of Blachernae in Constantinople, which contained the imperial treasury.
History
The Biccherna is the oldest and most important financial administration of Siena, which was first established in 1168 when the Scialenghi Counts transferred Asciano to the Senese consuls. With this administrative body, the existing imperial and episcopal tax organizations were reorganised.
The administration of the Biccherna consisted of five members, namely a chamberlain and four provisors, who remained in office for the duration of a term. The chamberlain was the highest person appointed by the Concistoro and was selected from the ranks of members of various monastic orders until 1350. This theoretically guaranteed the independence of the administration from powerful families. The leaders were lay people from the powerful families of the city, who were appointed by and belonged to the Concistoro. The administration of the Biccherna also included notaries, judges, scribe archive administrators, messengers and guards.
Throughout the 13th century and most of the 14th century, the Biccherna were responsible for the entire financial administration of the city. Transactions were recorded in various account books and passed to the Consiglio to be checked at the end of the period. The tasks have changed over time. The Biccherna were also responsible for keeping confiscated weapons, books about detainment and debtors, and lists of notaries, as well as for watching over individuals who could not be elected to public offices. The Biccherna also had to pay alms to churches and monasteries.
Since the first general cadastres of the city were written in 1316, the Biccherna had to regularly update them in books titled Tavola delle possessioni ("Table of possessions").
After 1390, the Biccherna were assigned other tasks, including the management of all outputs. Another innovation was that the chamberlain was selected amongst the laity and remained in office for one year, while the term of office was six months. The Medici reform initially left the area of responsibility of the Biccherna unchanged, but significantly reduced their importance. Under Grand Duke Pietro Leopoldo, the Biccherna was suppressed in the course of a general reform.